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HIP 94377 — Double Star in Sagitta

Magnitude 6.7m DoubleStar Sagitta (Sge) Visible
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1Physical Properties

Magnitude 6.73
Spectral Type B9IV subgiant
Star Color Blue-white (B-V -0.01)
Distance 466 ly

2Position & Identifiers

RA 19h 12m 34.4s
Dec +16° 50' 47.0"
Constellation Sagitta (Sge)
HR 7285
HIP 94377
HD 179588
SAO 104602
Double Cat 12160
SIMBAD

3How easy to split?

Primary 6.7 mag Companion 8.0 mag Separation 0.6″
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Telescope Bortle 3 Bortle 4 Bortle 5
80mm refr. V. hard V. hard V. hard
150mm Newt. V. hard+ V. hard+ V. hard+
C8 203mm V. hard+ V. hard+ V. hard+
Easy Medium Hard Very hard Impossible

Bortle 3 = rural · 4 = outer suburbs · 5 = suburbs

To reach "Medium" at Bortle 3, you'd need at least a 400 mm reflector.

4Visibility

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Best season Jun – Aug (peak: Jul)

5Multiple Star System Quintuple C: optical

Components 5 (quintuple)
Component IDs AC
Separation 0.6″
Companion Mag 8.0
Position Angle 276°
Star Colors A: Blue-white C: Yellow-white
Discoverer STTA177
B, 8.0v at 0.7" CPM. C is G5.

Separation over time

Period: 587.0 y Eccentricity: 0.533 Now: 0.56", PA 136° -0.02" in 5 years
0.00" 0.17" 0.33" 0.50" 0.67" 2025 2030 2035 2040 2045 0.56"

Apparent separation over time, computed from ORB6 orbital elements. Steep curves indicate fast-changing pairs — catch them while they're splittable.

Eyepiece View

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80x Dawes: 1.9″ TFOV: 0.6°
Realistic = true angular size
N E 276°

A: 6.7 · B: 8.0 · Sep: 0.6″ · PA: 276° · N up, E right

Unresolved · Rayleigh: 2.3″ · Dawes: 1.9″ · Eff: 2.3″

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6

Size Comparison

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8

Spectral Classification

9

Hertzsprung-Russell Diagram

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Read: The Hertzsprung-Russell Diagram — Reading Stars Like a Map
10

Stellar Lifecycle

11

Blackbody Spectrum

12

Stellar Absorption Spectrum

Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.

13

Stellar Fusion

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14Stellar Notes

0.001".
15

Light Travel Time Machine

16

Relativistic Travel

Nearby in the Sky

Other targets within a few degrees — pan your scope a little and keep exploring.

Visibility scores assume a 150 mm Newton at Bortle 4.

U Sge
Easy
Eclipsing binary, period 3.4d
Variable Star mag 6.58 3.1° Sagitta
NGC 6802
Easy
Open cluster
Open Cluster mag 8.8 5.5° Vulpecula
M71
NGC 6838
Easy
Globular cluster — dense ball of ancient stars
Globular Cluster mag 8.3 10.0° Sagitta
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